$ git clone -n https://github.com/xcp-ng-rpms/varstored.git /var/lib/mock/v8.3-incoming-10709-29261/root/chroot_tmpdir/scmroot/varstored
Cloning into '/var/lib/mock/v8.3-incoming-10709-29261/root/chroot_tmpdir/scmroot/varstored'...
$ git fetch origin 20eefef4f24c7d38dd13edddc856277e3ecb2662:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/varstored
 * [new ref]         20eefef4f24c7d38dd13edddc856277e3ecb2662 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20eefef Merge pull request #12 from xcp-ng-rpms/asv/rebase-290126